Service Intervals
WARNING: This page is about a different car, the 2004 Lexus IS 300 and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
Under normal driving conditions, inspect transmission fluid every 30,000 miles. Under severe conditions such as trailer towing, police, taxi, local delivery service or operating under dusty conditions, replace transmission fluid every 60,000 miles.